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Pakistan | Family List | Apocynaceae | Alstonia

1. Alstonia macrophylla Wall. ex. G. Don, Gen. Syst. Gard. 4:87. 1837. DC., Prodr. 8:409. 1844; Hook. f., Fl. Brit. Ind. 3:643. 1882; Bailey, St. Cycl. ;Hoyt. 1:266. 1947.


A tall tree. Leaves whorled, oblanceolate or elliptic-lanceolate, 7-30 x 4-10 cm, subcoriaceous, shinning above, paler beneath, with 15-20 pairs of lateral nerves, base attenuate; petiole c. 1 cm. Inflorescence a terminal many flowered corymbose cymes, pubescent. Flowers small, white. Calyx campanulate, lobes 5, ovate acute, pubescent, c. 0.5 mm long. Corolla cylindrical, glabrous outside, 5 mm long, mouth contracted, lobes rounded, pubescent, c. 3 mm long. Follicles numerous, slender pendulous, upto 45 cm long and upto only 5 mm broad.

Fl. Per. May-September.

Type: A cultivated specimen originating from Penang, Malaysia, Wallich Cat. No. 1648. (K).

Distribution: A native of Malaya. Cultivated occasionally in the gardens. It is recorded here for the first time in Pakistan.


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